. >> reporter: thursday, more children, including 6-year- old's allison wyatt and katherine hubbard, will be laid to rest, along with dawn hochsstrung. they bid well to victoria soto yesterday. while simon is a family friend of soto's performed the sound of silence at her funeral. ♪ >> reporter: the tragedy has sparked national debate over gun control with president obama pledging to take action. a newly formed group, newtown united is advocating what it calls sensible gun legislation. >> we have 20 children trying to point us the way. if we don't follow their lead, we've failed them and their deaths are in vein. >> reporter: friends say in recent years, nancy lanza felt uncomfortable leaving her son adam at home without being is up veer sized -- being supervised. back to you. >> thank you. >>> at a hearing on capitol hill, state d officials admitted to weaknesses in security related to the deadly september 11th attack on the u.s. consulate in libya. jamie dupree joins us via skype from washington, d.c. with what we're learning from in morning's hearing and from a scathing report o